The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
Rule 110 in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 160th Steffan153 🇫🇮 908 116 2ms 11 Feb 2026 162nd SirBogman 🇺🇸 907 43 3ms 28 Nov 2022 163rd ovs-code 🇩🇪 907 100 467ms 8 Mar 2022 163rd Steffan153 🇫🇮 907 100 496ms 23 Jul 2024 165th GrayJoKing 🇦🇺 905 91 21ms 8 Feb 2025 166th stefangimmillaro 905 101 2,629ms 20 Nov 2024 167th lynn 905 113 1,333ms 15 Sep 2021 168th Argeento 🇵🇱 904 80 18ms 8 Sep 2023 169th dvargas46 🇺🇸 904 82 35ms 12 Dec 2022 170th edsrzf 🇳🇿 904 124 314ms 22 Jun 2025 171st stefangimmillaro 903 105 125ms 13 Nov 2022 172nd JayXon 🇺🇸 903 109 134ms 23 Apr 2025 173rd sean-niemann 🇺🇸 902 95 89ms 29 Dec 2024 174th primo-ppcg 🇹🇭 902 102 40ms 15 May 2025 175th canissimia 🇦🇶 902 163 14ms 17 Dec 2022 176th sean-niemann 🇺🇸 901 82 139ms 8 Jan 2026 177th inventshah 901 100 11ms 28 Dec 2023 178th GrayJoKing 🇦🇺 901 109 95ms 3 Apr 2023 179th JayXon 🇺🇸 901 112 168ms 5 Sep 2023 180th edsrzf 🇳🇿 900 89 9ms 12 days ago 180th GrayJoKing 🇦🇺 900 89 9ms 10 days ago 182nd Alex-x90 🇺🇸 899 89 7ms 11 Feb 2023 183rd inventshah 899 108 62ms 4 Feb 2023 184th edsrzf 🇳🇿 899 112 8ms 27 Feb 2025 185th nwellnhof 🇩🇪 898 72 395ms 27 Oct 2024 186th stefangimmillaro 898 120 1,116ms 29 Sep 2023 187th GrayJoKing 🇦🇺 898 138 126ms 31 Mar 2023 188th GrayJoKing 🇦🇺 897 122 45ms 28 Apr 2024 189th kg583 🇺🇸 894 118 44ms 15 Mar 2025 189th edsrzf 🇳🇿 894 118 43ms 9 Apr 2025 191st tomtheisen 🇺🇸 893 81 12ms 2 Oct 2020 192nd MeWhenI 🇻🇦 892 96 78ms 16 Aug 2024 193rd primo-ppcg 🇹🇭 892 98 100ms 10 Nov 2023 194th inventshah 892 106 281ms 28 Oct 2023 195th edsrzf 🇳🇿 892 136 40ms 17 Jan 2025 196th m-tkach 🇺🇦 892 181 985ms 15 Jan 2025 197th JayXon 🇺🇸 891 91 421ms 28 Jun 2024 198th MeWhenI 🇻🇦 890 121 110ms 14 Mar 2023 199th CaedenHarper 🇨🇦 889 77 10ms 10 Dec 2025 200th sean-niemann 🇺🇸 889 83 3ms 3 Feb 2024 201st primo-ppcg 🇹🇭 889 90 7ms 26 Apr 2019 202nd sean-niemann 🇺🇸 889 102 633ms 14 Apr 2025 203rd primo-ppcg 🇹🇭 889 148 26ms 25 Jun 2022 204th JayXon 🇺🇸 889 157 1,674ms 15 Sep 2025 205th GrayJoKing 🇦🇺 888 120 18ms 8 Aug 2023 206th ngn 🇧🇬 886 44 3ms 13 Jan 2022 207th dcgjb 886 73 312ms 13 May 2024 208th sean-niemann 🇺🇸 883 102 9ms 28 Dec 2023 209th Alex-x90 🇺🇸 883 110 62ms 23 Feb 2023 210th primo-ppcg 🇹🇭 883 124 44ms 21 Jun 2022 211th primo-ppcg 🇹🇭 881 60 6ms 16 Oct 2020 212th inventshah 880 84 151ms 4 Aug 2024 213th ovs-code 🇩🇪 879 91 6ms 6 May 2025 214th Natanaelel 🇸🇪 878 65 39ms 29 Jul 2023 215th evilpegasus 878 78 13ms 20 Jul 2022 215th AlephSquirrel 878 78 12ms 12 Dec 2022 215th cros107 🇦🇺 878 78 13ms 29 Jun 2025 215th blaztoma 🇱🇹 878 78 13ms 4 Dec 2025 219th edsrzf 🇳🇿 876 130 147ms 15 Dec 2025 220th MeWhenI 🇻🇦 876 142 72ms 1 Aug 2023 221st btnlq 874 74 354ms 23 Feb 2021 222nd ovs-code 🇩🇪 874 98 23ms 13 Oct 2024 223rd primo-ppcg 🇹🇭 873 74 1,049ms 8 Feb 2022 224th btnlq 873 91 26ms 12 Dec 2021 225th typeswitch-dev 🇵🇹 873 122 4ms 7 Aug 2023 226th zacjl 872 121 44ms 13 Feb 2025 227th primo-ppcg 🇹🇭 872 160 1,815ms 9 Jun 2024 228th dmrichwa 🇺🇸 871 83 12ms 18 Dec 2022 229th namelessiw 871 93 459ms 28 Jun 2024 229th stefangimmillaro 871 93 407ms 15 Jan 2025 231st ovs-code 🇩🇪 871 193 1,433ms 2 Feb 2025 232nd emgordon154 870 68 1,515ms 3 Aug 2025 233rd xsot 🇸🇬 869 85 15ms 24 May 2025 234th sean-niemann 🇺🇸 869 126 46ms 16 Jan 2026 235th stefangimmillaro 869 129 123ms 23 Sep 2024 236th bstrat 867 45 4ms 18 Jun 2024 237th TFeld00 🇩🇰 867 79 191ms 5 Oct 2020 237th OwPowell 867 79 13ms 23 Dec 2023 237th xsot 🇸🇬 867 79 275ms 11 Feb 2024 240th xnor-gate 867 93 149ms 26 Dec 2021 First Prev 161–240 of 1,670 Next Last